S
M
T
W
T
F
S
30
70°
66°
31
76°
66°
1
78°
70°
2
85°
69°
3
81°
67°
4
74°
63°
5
74°
61°
6
70°
57°
7
75°
61°
8
75°
65°
9
79°
67°
10
75°
58°
11
68°
57°
12
69°
60°
13
73°
60°
14
74°
61°
15
74°
58°
16
75°
53°
17
74°
56°
18
67°
53°
19
72°
56°
20
74°
58°
21
75°
59°
22
73°
57°
23
72°
55°
24
68°
56°
25
72°
57°
26
70°
55°
27
67°
51°
28
61°
51°
29
61°
50°
30
60°
48°
1
59°
49°
2
60°
53°
3
65°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Smithville
Smithville's September 2026 forecast shows daily high temperatures ranging from 59° to 81°, with overnight lows between 48° and 67°. The average high for September is 71° with an average low of 57°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Smithville. See also: October | November | December.
